IN ancient times China was a well-forested land, even in the now-arid northwest and the cold Qinghai-Tibetan Plateau. Over 7,000 years of environmental changes and human activities, however,...
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IN ancient times China was a well-forested land, even in the now-arid northwest and the cold Qinghai-Tibetan Plateau. Over 7,000 years of environmental changes and human activities, however,...